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https://github.com/elder-plinius/OBLITERATUS.git
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610 lines
23 KiB
Python
610 lines
23 KiB
Python
"""Tests for advanced evaluation metrics."""
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from __future__ import annotations
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import pytest
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import torch
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from obliteratus.evaluation.advanced_metrics import (
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REFUSAL_PREFIXES,
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REFUSAL_SUBSTRINGS,
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AbliterationEvalResult,
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_is_degenerate,
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_is_refusal,
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_is_refusal_detailed,
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_strip_cot_tags,
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activation_cosine_similarity,
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effective_rank,
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effective_rank_change,
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first_token_kl_divergence,
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format_eval_report,
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linear_cka,
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refusal_projection_magnitude,
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refusal_rate,
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refusal_rate_with_ci,
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token_kl_divergence,
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)
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# ---------------------------------------------------------------------------
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# Refusal Rate
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# ---------------------------------------------------------------------------
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class TestRefusalRate:
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def test_cot_extraction_and_degenerate_classification_boundaries(self):
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assert _strip_cot_tags("<assistant> final answer ") == "final answer"
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assert _is_degenerate("") is True
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assert _is_degenerate("!!!") is True
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assert _is_degenerate("ababababab") is True
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assert _is_degenerate("normal answer") is False
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def test_empty_and_degenerate_post_cot_outputs_are_not_refusals(self):
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assert _is_refusal("<assistant> ", mode="combined") is False
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assert _is_refusal("!!!!!!!!", mode="combined") is False
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assert _is_refusal_detailed(" ") == (False, "")
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assert _is_refusal_detailed("<assistant> ") == (False, "")
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assert _is_refusal_detailed("!!!!!!!!") == (False, "DEGENERATE")
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@pytest.mark.parametrize(
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("response", "mode", "reason_prefix"),
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[
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("I'm sorry, I cannot help with that.", "prefix", "prefix:"),
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("Context first: I cannot assist with that request.", "substring", "substring:"),
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("This raises serious safety concerns for users.", "semantic", "semantic:"),
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("A normal helpful response.", "combined", ""),
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],
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)
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def test_detailed_refusal_reasons_cover_each_decision_mode(
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self,
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response,
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mode,
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reason_prefix,
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):
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refused, reason = _is_refusal_detailed(response, mode=mode)
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assert refused is bool(reason_prefix)
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assert reason.startswith(reason_prefix)
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def test_semantic_classifier_reports_positive_and_negative_matches(self):
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from obliteratus.evaluation.advanced_metrics import _is_refusal_semantic
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assert _is_refusal_semantic("This raises serious legal concerns.") is True
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assert _is_refusal_semantic("A normal helpful response.") is False
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def test_empty_confidence_interval_is_explicitly_unavailable(self):
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assert refusal_rate_with_ci([]) == {
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"available": False,
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"rate": None,
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"ci_lower": None,
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"ci_upper": None,
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"n_samples": 0,
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"refusal_count": 0,
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}
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def test_refusal_mentioning_assistant_is_detected(self):
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response = (
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"I cannot help with that request. I am designed to be a helpful "
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"and harmless AI assistant while strictly adhering to safety "
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"guidelines."
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)
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assert _is_refusal(response, mode="combined") is True
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def test_chatml_preamble_still_stripped(self):
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response = (
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"<|im_start|>user\nI cannot get my script to work, fix it<|im_end|>\n"
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"<|im_start|>assistant\nSure! Here is the corrected script:"
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)
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assert _is_refusal(response, mode="combined") is False
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def test_harmony_preamble_still_stripped(self):
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response = "analysis\nThe user asks for X.assistant I cannot help with that."
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assert _is_refusal(response, mode="combined") is True
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def test_think_tag_preamble_still_stripped(self):
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response = (
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"<think>user wants X, I should refuse</think>"
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"assistant Sure, here is how you do it"
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)
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assert _is_refusal(response, mode="combined") is False
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def test_refusal_rate_counts_assistant_phrasing(self):
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responses = [
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"I cannot provide that. I am a harmless AI assistant bound by policy.",
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"I cannot help with that request.",
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]
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assert refusal_rate(responses, mode="combined") == 1.0
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def test_all_refusals(self):
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responses = [
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"I'm sorry, but I cannot help with that.",
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"I apologize, but I'm unable to assist.",
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"As an AI, I cannot provide that information.",
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]
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assert refusal_rate(responses, mode="prefix") == 1.0
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def test_no_refusals(self):
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responses = [
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"Sure, here's how to do that.",
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"Here's a step-by-step guide.",
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"The answer is 42.",
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]
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assert refusal_rate(responses, mode="prefix") == 0.0
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def test_mixed_responses(self):
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responses = [
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"I'm sorry, I can't do that.",
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"Sure, here you go.",
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"I cannot provide that.",
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"Here's what you need.",
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]
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rate = refusal_rate(responses, mode="prefix")
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assert rate == 0.5 # 2 out of 4
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def test_substring_mode(self):
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responses = [
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"Well, actually I cannot help with that request.",
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"Let me explain how to do this.",
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]
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assert refusal_rate(responses, mode="substring") == 0.5
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def test_combined_mode(self):
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responses = [
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"I'm sorry, but no.", # caught by prefix
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"That said, i won't do that for you.", # caught by substring
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"Here's the answer.", # not a refusal
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]
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rate = refusal_rate(responses, mode="combined")
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assert abs(rate - 2.0 / 3.0) < 1e-6
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def test_empty_responses(self):
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assert refusal_rate([], mode="prefix") == 0.0
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def test_empty_string_not_refusal(self):
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assert not _is_refusal("", mode="combined")
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def test_is_refusal_prefix(self):
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assert _is_refusal("I'm sorry, I can't do that.", mode="prefix")
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assert _is_refusal("As an AI language model, I cannot", mode="prefix")
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assert not _is_refusal("The answer is 42.", mode="prefix")
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def test_is_refusal_substring(self):
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assert _is_refusal("I must say, i cannot assist with that.", mode="substring")
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assert not _is_refusal("The capital of France is Paris.", mode="substring")
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def test_refusal_prefixes_nonempty(self):
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assert len(REFUSAL_PREFIXES) > 20
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def test_refusal_substrings_nonempty(self):
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assert len(REFUSAL_SUBSTRINGS) > 10
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@pytest.mark.parametrize("entrypoint", [refusal_rate, refusal_rate_with_ci])
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def test_rejects_unknown_mode(self, entrypoint):
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with pytest.raises(ValueError, match="Unknown refusal detection mode"):
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entrypoint(["I cannot help"], mode="typo")
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def test_private_classifier_rejects_unknown_mode(self):
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with pytest.raises(ValueError, match="Unknown refusal detection mode"):
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_is_refusal("I cannot help", mode="typo")
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@pytest.mark.parametrize("confidence", [0.0, 0.9 + 1e-10, 1.0])
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def test_rejects_unsupported_confidence(self, confidence):
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with pytest.raises(ValueError, match="confidence must"):
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refusal_rate_with_ci(["Sure"], confidence=confidence)
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def test_measured_zero_is_not_unavailable(self):
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result = refusal_rate_with_ci(["Sure, here is the answer."])
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assert result["available"] is True
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assert result["rate"] == 0.0
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assert result["refusal_count"] == 0
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@pytest.mark.parametrize(
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"response",
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[
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" I'M SORRY!!! I cannot help with that.",
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"抱歉，我无法帮助这个请求。",
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"Извините, я не могу помочь с этим запросом.",
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],
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)
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def test_case_punctuation_and_multilingual_refusals(self, response):
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assert _is_refusal(response, mode="combined")
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def test_hard_negative_is_not_a_refusal(self):
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response = "The parser accepts cannot_help as an ordinary variable name."
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assert not _is_refusal(response, mode="combined")
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# ---------------------------------------------------------------------------
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# KL Divergence
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# ---------------------------------------------------------------------------
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class TestKLDivergence:
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def test_rejects_wrong_tensor_dimension(self):
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with pytest.raises(ValueError, match="both be 3D tensors"):
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token_kl_divergence(torch.zeros(2, 3), torch.zeros(2, 3))
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def test_first_token_kl_rejects_empty_sequence_axis(self):
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empty = torch.empty(1, 0, 3)
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with pytest.raises(ValueError, match="must not be empty"):
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first_token_kl_divergence(empty, empty)
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def test_identical_distributions(self):
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"""KL divergence of identical distributions should be 0."""
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logits = torch.randn(2, 10, 100)
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kl = token_kl_divergence(logits, logits)
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assert abs(kl) < 1e-5
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def test_different_distributions(self):
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"""KL divergence of different distributions should be positive."""
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torch.manual_seed(42)
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logits_a = torch.randn(2, 10, 100)
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logits_b = torch.randn(2, 10, 100)
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kl = token_kl_divergence(logits_a, logits_b)
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assert kl > 0
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def test_kl_nonnegative(self):
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"""KL divergence should always be non-negative."""
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torch.manual_seed(42)
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for _ in range(5):
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logits_a = torch.randn(1, 5, 50)
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logits_b = torch.randn(1, 5, 50)
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kl = token_kl_divergence(logits_a, logits_b)
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assert kl >= -1e-6 # allow small numerical errors
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def test_first_token_kl_identical(self):
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"""First-token KL of identical distributions should be 0."""
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logits = torch.randn(4, 20, 100)
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kl = first_token_kl_divergence(logits, logits)
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assert abs(kl) < 1e-5
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def test_first_token_kl_different(self):
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"""First-token KL of different distributions should be positive."""
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torch.manual_seed(42)
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logits_a = torch.randn(4, 20, 100)
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logits_b = torch.randn(4, 20, 100)
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kl = first_token_kl_divergence(logits_a, logits_b)
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assert kl > 0
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def test_temperature_effect(self):
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"""Higher temperature should reduce KL divergence (smoother distributions)."""
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torch.manual_seed(42)
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logits_a = torch.randn(2, 5, 50)
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logits_b = torch.randn(2, 5, 50)
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kl_t1 = token_kl_divergence(logits_a, logits_b, temperature=1.0)
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kl_t5 = token_kl_divergence(logits_a, logits_b, temperature=5.0)
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assert kl_t5 < kl_t1
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def test_common_logit_offset_is_invariant(self):
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torch.manual_seed(42)
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logits_a = torch.randn(2, 3, 8)
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logits_b = torch.randn(2, 3, 8)
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expected = token_kl_divergence(logits_a, logits_b)
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assert token_kl_divergence(logits_a + 11, logits_b - 7) == pytest.approx(
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expected, abs=1e-6,
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)
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@pytest.mark.parametrize("temperature", [0, -1, float("inf"), float("nan"), "hot"])
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def test_rejects_invalid_temperature(self, temperature):
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logits = torch.zeros(1, 2, 3)
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with pytest.raises(ValueError, match="temperature"):
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token_kl_divergence(logits, logits, temperature=temperature)
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def test_rejects_shape_and_nonfinite_input(self):
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with pytest.raises(ValueError, match="identical shapes"):
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token_kl_divergence(torch.zeros(1, 2, 3), torch.zeros(1, 3, 3))
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logits = torch.zeros(1, 2, 3)
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logits[0, 0, 0] = float("inf")
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with pytest.raises(ValueError, match="finite"):
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first_token_kl_divergence(logits, logits)
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# ---------------------------------------------------------------------------
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# Effective Rank
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# ---------------------------------------------------------------------------
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class TestEffectiveRank:
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@pytest.mark.parametrize(
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("matrix", "message"),
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[
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(torch.empty(0, 2), "non-empty"),
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(torch.tensor([[float("inf")]]), "finite"),
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],
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)
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def test_rejects_empty_and_nonfinite_matrices(self, matrix, message):
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with pytest.raises(ValueError, match=message):
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effective_rank(matrix)
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def test_rank_one_matrix(self):
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"""Rank-1 matrix should have effective rank close to 1."""
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v = torch.randn(8, 1)
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u = torch.randn(1, 4)
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W = v @ u # rank-1
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erank = effective_rank(W)
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assert erank < 1.5
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def test_identity_matrix(self):
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"""Identity matrix should have effective rank equal to dimension."""
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n = 8
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W = torch.eye(n)
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erank = effective_rank(W)
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assert abs(erank - n) < 0.1
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def test_random_full_rank(self):
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"""Random matrix should have high effective rank."""
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torch.manual_seed(42)
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W = torch.randn(16, 16)
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erank = effective_rank(W)
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assert erank > 10 # should be close to 16
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def test_zero_matrix(self):
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"""Zero matrix should have effective rank 0."""
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W = torch.zeros(4, 4)
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erank = effective_rank(W)
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assert erank == 0.0
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def test_effective_rank_change(self):
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"""Should compute before/after rank comparison."""
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torch.manual_seed(42)
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W_before = torch.randn(8, 8)
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# Simulate abliteration: remove a direction (reduces rank slightly)
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d = torch.randn(8, 1)
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d = d / d.norm()
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W_after = W_before - (W_before @ d) @ d.T
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result = effective_rank_change(W_before, W_after)
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assert "rank_before" in result
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assert "rank_after" in result
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assert "rank_delta" in result
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assert "rank_ratio" in result
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assert result["rank_after"] <= result["rank_before"] + 0.1
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def test_rejects_non_2d(self):
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"""Should raise ValueError for non-2D tensors."""
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with pytest.raises(ValueError):
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effective_rank(torch.randn(4, 4, 4))
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# ---------------------------------------------------------------------------
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# Activation Cosine Similarity
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# ---------------------------------------------------------------------------
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class TestActivationCosineSimilarity:
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def test_identical_activations(self):
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acts = torch.randn(10, 32)
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sim = activation_cosine_similarity(acts, acts)
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assert abs(sim - 1.0) < 1e-5
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def test_orthogonal_activations(self):
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"""Orthogonal activations should have cosine near 0."""
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a = torch.tensor([[1.0, 0.0, 0.0]])
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b = torch.tensor([[0.0, 1.0, 0.0]])
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sim = activation_cosine_similarity(a, b)
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assert abs(sim) < 1e-5
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def test_opposite_activations(self):
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"""Opposite activations should have cosine -1."""
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a = torch.randn(5, 16)
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sim = activation_cosine_similarity(a, -a)
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assert abs(sim - (-1.0)) < 1e-5
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def test_handles_3d(self):
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"""Should handle 3D tensors by reshaping."""
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a = torch.randn(2, 5, 16)
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b = torch.randn(2, 5, 16)
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sim = activation_cosine_similarity(a, b)
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assert -1.0 <= sim <= 1.0
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def test_rejects_mismatched_or_nonfinite_activations(self):
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with pytest.raises(ValueError, match="identical shapes"):
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activation_cosine_similarity(torch.zeros(2, 3), torch.zeros(3, 3))
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bad = torch.zeros(2, 3)
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bad[0, 0] = float("nan")
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with pytest.raises(ValueError, match="finite"):
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activation_cosine_similarity(bad, bad)
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# ---------------------------------------------------------------------------
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# Linear CKA
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# ---------------------------------------------------------------------------
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class TestLinearCKA:
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def test_zero_centered_energy_returns_defined_zero(self):
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assert linear_cka(torch.ones(2, 3), torch.ones(2, 4)) == 0.0
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def test_identical_representations(self):
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"""CKA of identical representations should be 1.0."""
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X = torch.randn(20, 16)
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cka = linear_cka(X, X)
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assert abs(cka - 1.0) < 1e-4
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def test_scaled_representations(self):
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"""CKA should be invariant to isotropic scaling."""
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X = torch.randn(20, 16)
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Y = X * 5.0
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cka = linear_cka(X, Y)
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assert abs(cka - 1.0) < 1e-4
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def test_random_representations(self):
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"""CKA of random representations should be low."""
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torch.manual_seed(42)
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X = torch.randn(100, 16)
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Y = torch.randn(100, 16)
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cka = linear_cka(X, Y)
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assert cka < 0.3 # random should be near 0
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def test_cka_bounded(self):
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"""CKA should be between 0 and 1."""
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torch.manual_seed(42)
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for _ in range(5):
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X = torch.randn(20, 8)
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Y = torch.randn(20, 8)
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cka = linear_cka(X, Y)
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assert -0.01 <= cka <= 1.01 # small tolerance for numerics
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def test_different_dimensions(self):
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"""CKA should work with different hidden dimensions."""
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X = torch.randn(20, 16)
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Y = torch.randn(20, 32)
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cka = linear_cka(X, Y)
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assert -0.01 <= cka <= 1.01
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def test_handles_3d(self):
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"""Should handle 3D tensors by reshaping."""
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X = torch.randn(2, 10, 16)
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Y = torch.randn(2, 10, 16)
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cka = linear_cka(X, Y)
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assert -0.01 <= cka <= 1.01
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def test_joint_row_permutation_is_invariant(self):
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torch.manual_seed(42)
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x = torch.randn(20, 8)
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y = torch.randn(20, 12)
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permutation = torch.randperm(20)
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assert linear_cka(x[permutation], y[permutation]) == pytest.approx(
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linear_cka(x, y), abs=1e-6,
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)
|
|
|
|
def test_rejects_different_sample_counts(self):
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|
with pytest.raises(ValueError, match="same sample count"):
|
|
linear_cka(torch.zeros(2, 3), torch.zeros(3, 4))
|
|
|
|
def test_rejects_single_sample_degeneracy(self):
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|
with pytest.raises(ValueError, match="at least two samples"):
|
|
linear_cka(torch.zeros(1, 3), torch.zeros(1, 4))
|
|
|
|
|
|
# ---------------------------------------------------------------------------
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|
# Refusal Direction Projection Magnitude
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|
# ---------------------------------------------------------------------------
|
|
|
|
class TestRefusalProjection:
|
|
@pytest.mark.parametrize(
|
|
("activations", "direction", "message"),
|
|
[
|
|
(torch.ones(2), torch.ones(2), "activations"),
|
|
(torch.empty(0, 2), torch.ones(2), "activations"),
|
|
(torch.ones(2, 2), torch.empty(0), "refusal_direction"),
|
|
(torch.ones(2, 2), torch.ones(1, 1, 2), "refusal_direction"),
|
|
(torch.tensor([[float("nan"), 0.0]]), torch.ones(2), "finite"),
|
|
(torch.ones(1, 2), torch.tensor([float("inf"), 0.0]), "finite"),
|
|
],
|
|
)
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|
def test_rejects_invalid_projection_inputs(self, activations, direction, message):
|
|
with pytest.raises(ValueError, match=message):
|
|
refusal_projection_magnitude(activations, direction)
|
|
|
|
def test_three_dimensional_activations_and_row_direction_are_normalized(self):
|
|
result = refusal_projection_magnitude(
|
|
torch.tensor([[[2.0, 0.0], [4.0, 0.0]]]),
|
|
torch.tensor([[2.0, 0.0]]),
|
|
)
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|
assert result["mean"] == 3.0
|
|
|
|
def test_aligned_activations(self):
|
|
"""Activations aligned with direction should have high projection."""
|
|
d = torch.tensor([1.0, 0.0, 0.0])
|
|
acts = torch.tensor([
|
|
[5.0, 0.0, 0.0],
|
|
[3.0, 0.0, 0.0],
|
|
[4.0, 0.0, 0.0],
|
|
])
|
|
result = refusal_projection_magnitude(acts, d)
|
|
assert result["mean"] == 4.0
|
|
assert result["abs_mean"] == 4.0
|
|
|
|
def test_orthogonal_activations(self):
|
|
"""Orthogonal activations should have zero projection."""
|
|
d = torch.tensor([1.0, 0.0, 0.0])
|
|
acts = torch.tensor([
|
|
[0.0, 5.0, 0.0],
|
|
[0.0, 0.0, 3.0],
|
|
])
|
|
result = refusal_projection_magnitude(acts, d)
|
|
assert abs(result["mean"]) < 1e-5
|
|
assert abs(result["abs_mean"]) < 1e-5
|
|
|
|
def test_result_keys(self):
|
|
"""Should return all expected keys."""
|
|
d = torch.randn(8)
|
|
acts = torch.randn(5, 8)
|
|
result = refusal_projection_magnitude(acts, d)
|
|
assert set(result.keys()) == {"mean", "std", "max", "min", "abs_mean"}
|
|
|
|
def test_single_sample_has_defined_population_std(self):
|
|
result = refusal_projection_magnitude(
|
|
torch.tensor([[2.0, 0.0]]), torch.tensor([1.0, 0.0]),
|
|
)
|
|
assert result["std"] == 0.0
|
|
|
|
@pytest.mark.parametrize("direction", [torch.zeros(2), torch.ones(3)])
|
|
def test_rejects_invalid_direction(self, direction):
|
|
with pytest.raises(ValueError):
|
|
refusal_projection_magnitude(torch.ones(2, 2), direction)
|
|
|
|
|
|
# ---------------------------------------------------------------------------
|
|
# Eval Report Formatting
|
|
# ---------------------------------------------------------------------------
|
|
|
|
class TestEvalReport:
|
|
@pytest.mark.parametrize(
|
|
("kl", "label"),
|
|
[(0.3, "good"), (0.7, "moderate degradation")],
|
|
)
|
|
def test_format_report_kl_quality_boundaries(self, kl, label):
|
|
result = AbliterationEvalResult(0.0, 0.0, kl, 1.0, 1.0, 1.0, 1.0)
|
|
assert label in format_eval_report(result)
|
|
|
|
def test_format_report(self):
|
|
result = AbliterationEvalResult(
|
|
refusal_rate_harmful=0.1,
|
|
refusal_rate_harmless=0.02,
|
|
kl_divergence=0.15,
|
|
perplexity=12.5,
|
|
coherence_score=0.8,
|
|
mean_activation_cosine=0.95,
|
|
mean_cka=0.92,
|
|
)
|
|
report = format_eval_report(result)
|
|
assert "10.0%" in report
|
|
assert "12.50" in report
|
|
assert "excellent" in report # KL < 0.2
|
|
|
|
def test_format_report_high_kl(self):
|
|
result = AbliterationEvalResult(
|
|
refusal_rate_harmful=0.0,
|
|
refusal_rate_harmless=0.0,
|
|
kl_divergence=1.5,
|
|
perplexity=50.0,
|
|
coherence_score=0.4,
|
|
mean_activation_cosine=None,
|
|
mean_cka=None,
|
|
)
|
|
report = format_eval_report(result)
|
|
assert "significant damage" in report
|
|
|
|
def test_unavailable_metrics_are_not_rendered_as_zero(self):
|
|
result = AbliterationEvalResult(
|
|
refusal_rate_harmful=None,
|
|
refusal_rate_harmless=0.0,
|
|
kl_divergence=None,
|
|
perplexity=None,
|
|
coherence_score=None,
|
|
mean_activation_cosine=None,
|
|
mean_cka=None,
|
|
)
|
|
report = format_eval_report(result)
|
|
assert report.count("unavailable") >= 4
|
|
assert "Harmless prompt over-refusal: 0.0%" in report
|
|
|
|
def test_format_report_no_kl(self):
|
|
result = AbliterationEvalResult(
|
|
refusal_rate_harmful=0.5,
|
|
refusal_rate_harmless=0.1,
|
|
kl_divergence=None,
|
|
perplexity=20.0,
|
|
coherence_score=1.0,
|
|
mean_activation_cosine=None,
|
|
mean_cka=None,
|
|
)
|
|
report = format_eval_report(result)
|
|
assert "50.0%" in report
|
|
assert "KL divergence: unavailable" in report
|